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[Xen-users] Xen Credit-Based CPU Scheduler


  • To: xen-users@xxxxxxxxxxxxxxxxxxx
  • From: Mohammed King <mohammed.king@xxxxxxxxx>
  • Date: Wed, 27 Jan 2010 19:03:23 -0500
  • Delivery-date: Wed, 27 Jan 2010 16:04:08 -0800
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  • List-id: Xen user discussion <xen-users.lists.xensource.com>

Hi all,

The xen documentation at http://wiki.xensource.com/xenwiki/CreditScheduler states that the max weight you can set for a domU is 65535. To verify this I decided to try setting 65535 to my dom0 which had no domUs running at the time. I was unable to set a weight of 65535. The server is a duel quad core (8 cores) with 32GB RAM running Centos 5.4/xen-3.0.3-94.el5_4.3 . The maximum weight I was able to set on this server is 32767.  Any idea why am not able to take advantage of the maximum weight.

[[root@node1 ~]# xm sched-credit -d 0 -w 65535
Error: (11, 'Resource temporarily unavailable')
Usage: xm sched-credit -d <Domain> [-w[=WEIGHT]|-c[=CAP]]
--
Mohammed King
Systems Administrator
----------------------------
No condition is permanent
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